<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        table{
            /* width: 300px;
            height: 300px; */
            margin: 50px auto;
        }
        .c2{
            border: 1px solid red;
            /* border-collapse: collapse; */
            border-spacing: 100px 100px;
        }
        td{
            width: 100px;
            height: 200px;
        }
        .c2 td{
            border: 1px solid green;
        
        }
    </style>
</head>
<body>
    <table class="c1" border="1px" cellspacing="0px">
        <tr>
            <td>超哥哥</td>
            <td>超哥哥</td>
            <td>超哥哥</td>
        </tr>
 
        <tr>
            <td>超哥哥</td>
            <td>超哥哥</td>
            <td>超哥哥</td>
        </tr>
        </table>
        <table class="c2">
                <tr>
                    <td>超哥哥</td>
                    <td>超哥哥</td>
                    <td>超哥哥</td>
                </tr>
                <tr>
                        <td>超哥哥</td>
                        <td>超哥哥</td>
                        <td>超哥哥</td>
                    </tr>
            </table>
</body>
</html>